Gas-burner



G. W. AND C. H. BUDDE.

GAS BURNER.

APPLICATION HLEp JAN. 23. 1919.

1,367,296. Patented Feb. 1, 1921.

C/wrs. Baa

UNITED STATES PATENTjOFFICE.

enoner. w. BUDDE AND CHARLES H. BUDDE, or sr. Louis, MISSOURI.

GAS-BURNER.

Specification of Letters Patent.

Patented Feb. 1, 1921.

Application filed January 23, 1919. Serial No. 272,637.

gas at the burner, and for utilizing heat radiated from the burner forheating the air supplied to promote combustion.

The above objects are attained bya novel construction of stove whereinthe burner is surrounded by a member, preferably of, or

lined with, a heat insulating material providing a combustion chamberand serving to localize the application of the flame and heat ofcombustion, and said member is inclosed at a distance by a secondmember, which provides for the passage of air in a cone exterior to thecombustion chamber and then into the bottom of the same, whereby suchheat as is radiatedor dispersed laterally will be to a large extentutilized in heating the air thus circulating about and supplied to thecombustion chamber.

Aside from the general objects above outlined, the invention has forfurther objects certain details of construction and combinations andarrangements ofparts, all of which will be more clearly understood fromthe detailed description following.

The invention is illustrated in the accompanyingdrawing, in which thefigure is a central vertical sectional view through a stove constructedaccording to our invention.

Referring to the'drawing, the numeral 1 tions 3, to permit the entranceof air into the casing. Secured on the top of the casmg l is an annularring 4, which is provided with a depending annular shouldered portion 5,which is adapted to receive an annular supporting flange 6, provided atthe top of a metal cone-shaped member 7, the latter be1ng in the form ofa truncated cone with its smaller end projecting into the caslng 1. Thenumeral-8 indicates a second metal cone-shaped member, which-is securedat its upper end,in any suitablemanner, to the annular ring 4, and hasits wall extendmg parallel to and at a distance from the wall of themember 7. The cone shaped member 8 provides a chamber which is closed atits lower end by a bottom 9, which extends parallel with, and at adistance from the lower open end of the memher 7, and at a suitabledistance above the clrcular row of apertures 3 in the wall of thecasing 1. The cone-shaped member 8, as will be seen, provides a chamber,and this chamber is provided at its upper end, adjacent to the ring 4,with a circular series of apertures 10, for the admission of air.Supported on the top of the annular ring 7, and extending into andcovering the entire inner surface of the wall of the member 7, is alayer of asbestos 11. A similar layer of asbestos, 12, is supported onthe bottom 9 of the chamber 8. The numeral 13 indicates the gas burner,which is of the usual, or any preferred construction, being attached toa supply pipe 14 provided with air ports 15 and a nipple 16, to whichlatter a rubber or other tube may be connectedfor supplying gas to theburner. On the top ofthe stove there is provided the usual grid 17,comprising a circular series of ra dially disposed ribs 18, as will beunder stood.

In operation, the gas at the burner 13 being ignited, air will be drawninto the casing 1 through the openings 3, and passing upward in thecasing and then through the openings 10 in member 8 will pass down inthe, spacelt) between the walls of the two members 7 and 8 and enter theformer at the bottom, supplying oxygen to the ignited gas to promote andsecure completecombustion thereof. This is the more necessary as, when avessel such as a pot, or skillet, is

placed on the grid 17, the combustion chamher providedby the member 7is, to a large extent, inclosed, and the ignited gas would otherwise beprevented from havlng the necessary amount of air supplied thereto tosecure proper combustion. In its passage downward around the member 7the air supplied to the combustion chamber will be highly heated, andthus enter the combustion chamber in the best condition to promotecombustion of the gas at the burner. In this way we not only utilize theradiated heat'for heating the air, but this heat is, in eflect,reapplied for the purpose of heatin By inclosing the burner in themember 7, which in turn is covered with asbestos to prevent in largemeasure the radiation of heat, we providethat the eflective heatgenerated by the burner is greatly'increased, not only by restrictingradiation, but by localizing the application of the flame and heat tothe object to be heated, and thereby preventing the, lateral dispersionboth of the flame and heat, as occurs in the use of ordinary gas burnersused in the open. However, notwithstanding the use of asbestos, theintense heat of combustion raises the temperature of the asbestos and ofthe member 7 to a very high degree; but, as explained above,the'resultant heat which is radiated from the exterior of the member 7will be utilized in heating the incoming air admitted through theopeninglO, so that such heat is not lost, but is largely returned in theform of heated air to the combustion chamber.

The layer or sheet of asbestos 12 serves as a heat insulating andretracting medium, to cause the. heat, which would otherwise radiatefrom the bottom 9, to be deflected back into the combustion chamber.

It will be understood, of course, that after operating for a littlewhile even the casing 1 will be heated to some degree, as well as themember 8, so that the air will begin to be heated as soon as it entersthe openings 3, and will be further heated in its passage upward incontact with the wall of the chamber 8 to the openings 10.

-We have found, in practice, that a burner constructed as we have hereinshown and described, produces a very high degree of heat,

as compared with the ordinary gas burner in common use; and, by localizng the application of the flame of the burner, without thereby loweringthe degree of combustion of the gas, but, on the contrary, increasingit; and, further, by localizing, that is preventing lateral dispersionof, the heat and flame, a given quantity of material, such as water, forexample, may with our burner be brought to a given temperature with muchmore'rapidity than with the same burner, using the same flow of gas, butnot provided with our improvement; or, which amounts to the same thing,the water can be brought to boil at the same time with our stove as inthe use of the ordinary burner, but with a greatly reduced consumptionof gas.

We have shown our invention as embodied in a single-burner, portablestore; but it will be understood that the same may be utilized in theconstruction and operation of a gas range employing any desired numberof burners,

lVhile we have shown and described the members 7 and 8 as beingcone-shaped, we do not wish to be limited to this particular shape, asit is perfectly obvious, without illustration that the same could be inthe form of cylinders, or that they could be elliptical or evenrectangular in cross-section without in any manner departing from thepurpose of the invention.

We claim 1. A stove comprising a gas burner, a conical membersurrounding said burner and open at the top and bottom, a second conicalmember inclosing said first member at a distance therefrom and providedwith air inlets at its top, whereby air may pass into said inlets anddownward in the space between said members and into said firstnamedmember, said members terminating in substantially the same plane at thetop of the device.

2. A stove comprising a gas burner, a heat insulating member surroundingsaid burner and open at the top and bottom. a second member inclosingsaid first-named member at a distance therefrom, and terminating insubstantially the same plane at the top of the device and provided withair inlets at its top, and a heat insulating medium supported on thebottom of said latter member.

3. A stove comprising a cylindrical casing provided toward its bottomwith air inlets, a gas burner located within said casing, a conicalmember surrounding said burner, and a second conical member inclosingsaid first-named member at a distance therefrom and provided with airinlets at its top, said casing and members terminating in substantiallythe same plane at the top of the device.

4. A stove comprising a casing provided toward its bottom with airinlets, a gas burner located within said casing, a member supported fromsaid casing and surrounding said burner, and a second member alsosupported from said casing and inclosing said first-named member at adistance therefrom and provided with air inlets at its top, said casingand members terminating in substantially the same plane at the top ofthe device.

5. A stove comprising a casing supporting a grid and provided with airinlets toward its bottom, a gas burner located within said casingbeneath said grid, a memher supported by said casing and surroundinsubstantially the same plane at the top ing said burner and being openat the top of the device. and bottom, and a second member also sup- Intestimony whereof We have hereunto 10 ported from said casing andinclosing said set our hands.

5 firstmamed member at a distance therefrom and being provided with airinlets at its GEORGE W. BUDDE. top, said casing and members terminatingCHARLES H. BUDDE.

